The shown instrument is a 130 voice
reed instrument in original rheinische Lage with zinc reed plates
mounted on box shape reed chambers for the bass, and flat board chambers
for the treble. The size is smaller than regular
dual voice instruments: 20 cm height and 21 cm deep. The closed instrument
is about 27 cm wide without the handle and buttons and 37 cm over all.
In extended state it measures about 67 cm. The reduced dimension
of the instrument is possible since only one reed acts per note.
The pencil written serial number (156) is
found inside each instrument cover. A round swiss customs
stamp says ZOLL I-28 and indicates
presumably the time the instrument was imported.
The buttons are made of
wood and are partially capsuled with metal caps (original) like those
used until World War I. Some of the buttons are simply painted with
aluminum paint and have metal plates glued to the tips. Other buttons
are not original and remade of aluminum with the advantage to having
no friction with the wooden
cover. The average button distance is 22 mm and indicates that it
is not a children's study instrument.
The bellow has 10 folds each 26 mm deep and which are devided by one
bellow frame (10/1). The
bass dumper case is straight (no wave shape).
The instrument sounds very similar to an english concertina due to the
single reed construction and the large volume of the reed chambers.
It is far less agressive but sweet and a bit dull.